JPH0940193A - Image forming device - Google Patents

Abstract

(57) An object of the present invention is to prevent contact between a take-out roller and a sheet at the time of taking in and out of a paper feed cassette without providing a take-out roller so as to move up and down and without forming a half-moon shape. It is an object of the present invention to provide an image forming apparatus configured as described above. The present invention relates to an apparatus main body 30 that has a pickup roller 4 fixedly, and a paper feed cassette 1 that is provided in the apparatus main body 30 so as to be able to move in and out, and that stores a paper P taken out by the pickup roller 4. A tray 2 on which the paper P stored in the paper feed cassette 1 is placed;
The compression springs 3 and 3 for biasing the tray 2 to press the paper P against the pickup roller 4 and the tray 2 against the biasing force of the compression springs 3 and 3 when the sheet cassette 1 is pulled out. And a tray pushing mechanism 17 for lowering it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus used as, for example, an electrophotographic apparatus and provided with a paper feed cassette that can be inserted and removed.

[0002]

2. Description of the Related Art An electrophotographic apparatus is provided with a paper feed cassette that can be inserted into and taken out of the main body of the apparatus, and paper is stored in the paper feed cassette. When the paper feed cassette is inserted into the main body of the apparatus, the paper in the paper feed cassette faces the pickup roller (takeout roller) and is taken out by the rotation of the pickup roller. The sheet thus taken out is sent to a registration roller to be aligned, and then sent to an image transfer section between the photosensitive drum and the transfer charger to transfer an image.

As the pickup roller, there are a pickup roller which can be moved up and down, and a pickup roller which is formed in a half-moon shape and is fixedly provided. In order to prevent the paper feed cassette from coming into contact with the pickup roller when the paper feed cassette comes in and out of the main body of the device, the vertically movable pickup roller is moved upward, and the half-moon shaped pickup roller has an arc portion upward. Is rotated so as to be located at.

However, in the type in which the pickup roller moves up and down, a mechanism for moving up and down must be provided on the apparatus main body side of the copying machine, and the number of parts becomes large and the structure becomes complicated. There was an inconvenience.

In the case of a half-moon shaped sheet, a gap between the D-cut surface of the half-moon roller and the sheet in the sheet feeding cassette is set so that the sheet feeding cassette is not caught in the sheet feeding cassette. The diameter of the roller must be large because it has to be large and must come into contact with the paper at the time of feeding. Therefore, a large installation space is required for the half-moon roller, which causes a problem of increasing the size.

[0006]

[Patent Document 1] Japanese Unexamined Patent Publication No. 6-1
As seen in Japanese Patent No. 15723 and the like, a technique has been considered in which the half-moon roller and the uppermost sheet are prevented from contacting each other by lowering the sheet tray when the sheet cassette is taken in and out.

However, it is very difficult to prevent the contact between the sheet and the roller immediately after the beginning of the cassette drawing or immediately before the end of the cassette storage in such a system in which the cassette drawing and the tray descending are interlocked. It was

In view of this, the present invention provides an image forming apparatus capable of preventing contact with the take-out roller when the paper cassette is taken in and out from the start to the end of the cassette drawing and from the start to the end of the cassette storing operation. The purpose is to provide.

[0009]

In order to solve the above-mentioned problems, the present invention provides a device main body having a take-out roller in a fixed manner, and an apparatus main body which can be inserted into and taken out from the main body. A paper feed cassette for storing the paper taken out by the take-out roller, a placing member for placing the paper stored in the paper feed cassette, and a biasing of the placing member to press the paper against the take-out roller. It comprises an urging member and a lowering means for lowering the placing member against the urging force of the urging member when the sheet feeding cassette is pulled out.

According to a second aspect of the present invention, there is provided an apparatus main body having a take-out roller fixed thereto, a paper feed cassette provided in the main body of the apparatus so as to be able to be taken in and out, and storing a sheet taken out by the take-out roller, and the paper feeding cassette. A placing member for placing the paper stored in the paper cassette, an urging member for urging the placing member to press the paper against the take-out roller, and an operation member connected to the placing member. And a lowering means for pulling the operation member and lowering the mounting member against the urging force of the urging member when the paper feed cassette is pulled out.

According to a third aspect of the present invention, there is provided an apparatus main body having a take-out roller fixed thereto, a paper feed cassette which is provided in the apparatus main body so as to be able to be taken in and out, and accommodates the paper taken out by the take-out roller, and the paper feed cassette. A loading member for loading the paper stored in the paper cassette, a biasing member for biasing the loading member to press the paper against the take-out roller, and a wire connected to the loading member. And a rack that is provided in the apparatus main body and engages with the rack to fix the rack when the paper feed cassette is pulled out, thereby pulling the wire and resisting the biasing force of the biasing member. And a ratchet for lowering the mounting member.

According to a fourth aspect of the present invention, there is provided an apparatus main body having a take-out roller fixed thereto, and a side surface provided in the apparatus main body so as to be able to be taken in and out, for accommodating sheets taken out by the take-out roller and along the take-out direction. Paper feed cassette having a cam groove in its portion, a loading member for loading the paper stored in the paper feed cassette, and a biasing member for biasing the loading member to press the paper against the take-out roller A rack connected to the mounting member via a wire, and a rack provided in the apparatus main body, which operates along the cam groove when the paper feed cassette is pulled out to engage with the rack. A ratchet for fixing the rack to pull the wire and lower the mounting member against the urging force of the urging member.

According to a fifth aspect of the present invention, there is provided an apparatus main body having a take-out roller fixed therein, a paper feed cassette which is provided in the apparatus main body so as to be able to be taken in and out, and accommodates the paper taken out by the take-out roller, and the paper feed cassette. A placing member for placing the paper stored in the paper cassette, an urging member for urging the placing member to bring the paper into pressure contact with the take-out roller, and the above-mentioned setting device when the paper cassette is pulled out. Lowering means for lowering a member against the urging force of the urging member, restriction means for restricting movement of the placing member urged by the urging member in the urging direction, and the paper feed cassette Is provided with a releasing means for releasing the restriction of the restricting means when it is inserted into the apparatus body.

According to a sixth aspect of the present invention, there is provided an apparatus main body having a take-out roller fixed therein, a paper feed cassette which is provided in the apparatus main body so as to be able to be taken in and out, and accommodates the paper taken out by the take-out roller, and the paper feed cassette. A loading member for loading the paper stored in the paper cassette, a biasing member for biasing the loading member to press the paper against the take-out roller, and a wire connected to the loading member. And the first rack,
When the paper feed cassette is pulled out, it is provided in the apparatus main body and engages with the first rack to fix the first rack, thereby pulling the wire and applying a biasing force to the biasing member. A first ratchet that lowers the placing member against it, a second rack provided in the middle of the wire, and a second rack that is detachably engaged with the second rack and is placed by the urging member. Second for restricting movement of the placing member in the urging direction
It is equipped with a ratchet.

According to a seventh aspect of the present invention, there is provided an apparatus main body having a take-out roller fixed therein, a paper feed cassette which is provided in the apparatus main body so as to be able to be taken in and out, and which stores paper taken out by the take-out roller, and the paper feed cassette. A loading member for loading the paper stored in the paper cassette, a biasing member for biasing the loading member to press the paper against the take-out roller, and a wire connected to the loading member. And the first rack,
When the paper feed cassette is pulled out, it is provided in the apparatus main body and engages with the first rack to fix the first rack, thereby pulling the wire and applying a biasing force to the biasing member. A first ratchet that lowers the placing member against it, a second rack provided in the middle of the wire, and a second rack that is detachably engaged with the second rack and is placed by the urging member. Second for restricting movement of the placing member in the urging direction
And the ratchet provided in the apparatus main body, when the paper feed cassette is inserted, the second ratchet is operated by abutting against the second ratchet, and the second ratchet is disengaged from the second rack to release the regulation. And a releasing means.

According to an eighth aspect of the present invention, there is provided an apparatus main body having a take-out roller fixed therein, a paper feed cassette provided in the apparatus main body so as to be able to be taken in and out, and storing a sheet taken out by the take-out roller, and the paper feeding cassette. A loading member for loading the paper stored in the paper cassette, a biasing member for biasing the loading member to press the paper against the take-out roller, and a wire connected to the loading member. And the first rack,
When the paper feed cassette is pulled out, it is provided in the apparatus main body and engages with the first rack to fix the first rack, and pulls the wire to resist the urging force of the urging member. Ratchet for lowering the mounting member by means of the bias, a second rack provided in the middle of the wire, and a second rack that is detachably engaged with the mounting member by the biasing member. A second ratchet that restricts the movement of the ratchet in the urging direction, and the second ratchet that is provided in the main body of the apparatus and abuts against the second ratchet when the paper feed cassette is inserted to operate the second ratchet. A release means for releasing the regulation by detaching from the second rack, and a display means provided on the second rack and interlocking with the placing member and displaying the remaining amount of the sheet on the placing member. I will do it.

According to a ninth aspect of the present invention, there is provided an apparatus main body having a take-out roller fixed therein, a paper feed cassette which is provided in the apparatus main body so as to be able to be taken in and out, and accommodates the paper taken out by the take-out roller, and the paper feed cassette. A loading member for loading the paper stored in the paper cassette, a biasing member for biasing the loading member to press the paper against the take-out roller, and a wire connected to the loading member. And the first rack,
When the paper feed cassette is pulled out, it is provided in the apparatus main body and engages with the first rack to fix the first rack, thereby pulling the wire and applying a biasing force to the biasing member. A first ratchet that lowers the placing member against it, a second rack provided in the middle of the wire, and a second rack that is detachably engaged with the second rack and is placed by the urging member. Second for restricting movement of the placing member in the urging direction
And the ratchet provided in the apparatus main body, when the paper feed cassette is inserted, the second ratchet is operated by abutting against the second ratchet, and the second ratchet is disengaged from the second rack to release the regulation. The releasing means is connected to a middle portion of the wire between the first rack and the second rack, and when the paper feeding cassette is pulled out, the placing member is lowered to the limit, and then elastically elastically. And a stretchable elastic member.

According to the first aspect of the present invention, when the sheet feeding cassette is pulled out, the placing member is lowered by the lowering means against the urging force of the urging member to prevent contact with the take-out roller. To do.

According to a second aspect of the present invention, when the paper feed cassette is pulled out, the operation member connected to the tray is pulled by the lowering means to lower the placing member against the urging force of the urging member, so that the sheet is taken out. Be able to prevent contact with the rollers.

According to a third aspect of the present invention, when the sheet feeding cassette is pulled out, a ratchet is engaged with the rack to fix the rack, so that the wire is pulled to resist the urging force of the urging member. By lowering the placing member, it is possible to prevent contact with the take-out roller.

According to a fourth aspect of the present invention, when the paper feed cassette is pulled out, a ratchet is operated along the cam groove of the paper feed cassette to engage with the rack to fix the rack, thereby pulling the wire. By lowering the placing member against the urging force of the urging member, it is possible to prevent contact with the take-out roller.

According to a fifth aspect of the present invention, when the sheet feeding cassette is pulled out, the placing member is lowered by the lowering means against the urging force of the urging member, so that contact with the take-out roller can be prevented. To do.

Further, by restricting the movement of the mounting member urged by the urging member in the urging direction by the restricting means, it is possible to prevent contact with the take-out roller when the sheet cassette is inserted.

According to a sixth aspect of the present invention, when the sheet feeding cassette is pulled out, the first ratchet is engaged with the first rack to fix the first rack, whereby the wire is pulled to urge the biasing member. The mounting member is lowered against the urging force of the wire, and the second rack provided in the middle of the wire and the second ratchet are detachably engaged with the second rack to urge the wire. By restricting the movement of the mounting member in the urging direction by the member, it is possible to prevent contact with the take-out roller when the paper cassette is taken in and out.

According to a seventh aspect of the present invention, when the sheet feeding cassette is pulled out, the first ratchet is engaged and fixed to the first rack to pull the wire to attach the biasing member. By lowering the mounting member against the force and engaging the second ratchet with the second rack provided in the middle of the wire, the movement of the mounting member in the urging direction is restricted. It is possible to prevent contact with the take-out roller when the paper cassette is taken in and out.

When the paper feed cassette is inserted into the main body of the apparatus, the second ratchet is disengaged from the second rack by bringing the second ratchet into contact with the releasing means to operate. By releasing the paper, the paper can be taken out by contacting the paper with the take-out roller after the insertion.

Further, according to the present invention, the display means provided on the second rack and interlocking with the mounting member,
By displaying the remaining amount of paper on the placing member, the remaining amount of paper can be easily visually discriminated from the outside.

Further, according to a ninth aspect of the present invention, the elastic member is connected to the middle portion of the wire between the first rack and the second rack, and when the paper feeding cassette is pulled out, the placing member is limited. After descending to, the elastic member is extended so that the paper feed cassette can be pulled out.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to an embodiment shown in FIGS. FIG. 2 shows a sheet feeding device, and reference numeral 1 in the figure denotes a sheet feeding cassette. A tray 2 as a mounting member is provided in the paper feed cassette 1. One end of the tray 2 is rotatably supported by the support shaft 2a, and the sheets P are stacked on the tray 2. Between the inner bottom of the paper feed cassette 1 and the other end of the tray 2, compression springs 3 are provided as biasing members, and the compression springs 3 cause the tray 2 to rotate upward. Is urged by.

A pickup roller 4 as a take-out roller is provided above the paper feed cassette 1, and the paper P is pressed against the pickup roller 4 by the urging force of the compression springs 3, 3.

FIG. 3 shows the tray lock mechanism 12. One end of a wire 5a as an operating member is connected to the tray 2, and the wire 5a is connected to the second rack 7 via pulleys 6 and 6. The second rack 7 is urged by a tension spring 20 as a lowering means which will be described later. The locking claw 10 of the second ratchet 9 is releasably engaged with the second rack 7 so that the second ratchet 9
As shown in FIG. 4, the spring member 11 is urged to rotate downward. The tension of the tension spring 20 is stronger than the pressing force of the spring 11,
When the tray 2 is pushed down by hand, the tension spring 20 pulls the second rack 7 in the arrow a direction. The pressing force of the compression springs 3 is 3
It is stronger than 0, and when you release your hand from Tray 2, the second
When the rack 7 is to be returned in the direction of the arrow b, the locking claw 10 of the second ratchet 9 meshes with the second rack 7 so that the tray 2 is locked.

FIG. 5 shows the lock release mechanism 16. Reference numeral 13 in the drawing denotes a base in the main body 30 of the electrophotographic apparatus, and a projection 14 for unlocking is provided on the lower surface of the front side of the base 13. The protrusion 14 is located in the passage of the second ratchet 9 when the paper feed cassette 1 is moved in and out, and when the paper feed cassette 1 is inserted into the electrophotographic apparatus main body 30 from the state shown in FIG. Ratchet 9 of 2
As shown in FIGS. 5 (b) and 6 (b), the second ratchet 9 is rotated against the biasing force of the spring 11 so that the second ratchet 9 is rotated against the second rack. It is designed to be released from 7 and unlocked.

1 and 7 show a pushing mechanism 17 for lowering the tray 2. In the figure, 24 is a paper feed cassette 1.
The guide groove formed on one side surface of the guide groove 24
A first rack 18 is slidably provided on the. One end of the first rack 18 is connected to the second rack 7 via a wire 5b as an operating member.
A tension spring 20 is connected to the other end of the first rack 18. A first ratchet 21 provided inside the main body of the electrophotographic apparatus is removably engaged with the first rack 18. The first ratchet 21 is rotatably provided around the support shaft 21a and is biased by a spring member 23 shown in FIG. 8 to be engaged.

FIG. 8 shows the cam 25. A cam 25 is formed in the guide groove 24 of the first rack 18. The first ratchet 21 is provided with a protrusion 27,
When the protrusion 27 disengages from the cam 25, the first
The locking claw 26 of the ratchet 21 is engaged with and disengaged from the first rack 18.

Next, the operation of moving the paper feed cassette 1 in and out will be described. First, when inserting the paper feed cassette 1,
After the paper P is placed on the tray 2, the paper P is pushed downward against the urging force of the compression springs 3, 3. As a result, the wires 5a and 5b bend, and the wires 5a and 5b are pulled by the pulling force of the tension spring 20 by the amount of the bending, and the first and second racks 18 and 7 move. After this movement, even if the paper P is released, the second rack 7
Then, the second rack 7 is fixed by the engagement with the second ratchet 9, and the second rack 7 is not returned upward due to the pushing-up force of the compression springs 3, 3.

From this state, when the paper feed cassette 1 is inserted into the main body 30 of the apparatus as shown in FIG. 5A and completely inserted into the main body 30 of the apparatus as shown in FIG. 5B. , The end portion of the second ratchet 9 abuts on the protrusion 14, and the second ratchet 9 rotates against the biasing force of the spring member 11, and as shown in FIG. 10 for the second rack 7
And the second rack 7 is unlocked.

As a result, the tray 2 is pushed up by the urging force of the compression springs 3 to bring the sheet P into contact with the pickup roller 4 so that the sheet can be fed. Next, a case where the paper feed cassette 1 is pulled out from the apparatus main body 30 will be described.

When the paper feed cassette 1 is pulled out, the projection 27 of the first ratchet 17 falls into the cam groove 25 by the force of the spring 23, and the claw 26 thereof is engaged with the first rack 18 so that the first rack 18 is engaged. Fix 18 When the paper feed cassette 1 is further pulled out from this state, the wire 5b and the second
The tray 2 is pulled via the rack 7 and the wire 5b, and the tray 2 is lowered against the pushing force of the compression springs 3,3. As a result, the upper surface of the paper P is separated from the pick-up roller 4 and is ready to be pulled out.

The present invention is not limited to the above-mentioned embodiment, but may be as shown in FIG. When the paper feed cassette 1 is pulled out from the apparatus main body 30, if the paper is almost full, the tray 2 cannot be sufficiently stroked (dimension a shown in FIG. 1) and the cam groove 2
In some cases, the dimension a is smaller than the width dimension b of 5. In such a case, the tray 2 becomes horizontal while the first ratchet 17 on the apparatus main body 30 side and the first rack 18 on the side are engaged with each other, and the tray 2 cannot be further lowered, so that the sheet feeding operation is performed. The cassette 1 cannot be pulled out.

In order to prevent this, a spring 35 is provided between the first rack 18 and the second rack 7. When the tray 2 cannot be lowered when the sheet cassette 1 is pulled out, the spring 35 extends so that the sheet cassette 1 can be pulled out.

The spring 35 must have a stronger force than the tension spring 20 that pulls back the rack 7. When the spring 35 operates during paper feeding, the balance between the compression springs 3 and 3 that push up the tray 2 and the spring 20 that pulls back the rack 7 is lost, which impairs paper feeding performance. Therefore, the spring 35 operates during paper feeding. It is supposed not to.

In the present invention, as shown in FIG. 10, the tray lock mechanism 41 may be provided with color-coded display means 42 for displaying the remaining amount of the paper P on the tray 2. As shown in FIG. 11, the display means 42 faces a display window 43 formed on the front surface of the paper feed cassette 1 and slides as the tray 2 moves up and down.

When the tray 2 descends, it moves in the direction of arrow a, and when the tray 2 rises, it moves in the direction of arrow b. For example, as it moves in the direction of arrow a, the display amount of red is increased and the remaining amount of paper remains. Show that there are few.

[0044]

As described above, the present invention has the following features.
When the paper feed cassette is pulled out, since the placing member is lowered by the lowering means against the urging force of the urging member, contact between the take-out roller and the paper can be prevented, and the paper feed cassette can be pulled out satisfactorily. be able to.

According to the second aspect of the present invention, when the paper feed cassette is pulled out, the operating member connected to the tray is pulled by the lowering means to lower the placing member against the urging force of the urging member. The contact between the paper and the paper can be prevented, and the paper feed cassette can be pulled out satisfactorily.

According to a third aspect of the present invention, when the paper feed cassette is pulled out, a ratchet is engaged with the rack to fix the rack, and the wire is pulled by the pulling operation of the paper feed cassette to pull the wire. Since the placing member is lowered against the urging force of the sheet feeding device, it is possible to prevent contact between the take-out roller and the sheet, and to pull out the sheet feeding cassette satisfactorily.

According to a fourth aspect of the present invention, when the paper feed cassette is pulled out, a ratchet is operated along the cam groove of the paper feed cassette to engage with the rack to fix the rack, thereby pulling the wire. Since the placing member is lowered against the urging force of the urging member, it is possible to prevent contact between the take-out roller and the sheet, and it is possible to favorably pull out the sheet feeding cassette.

According to the fifth aspect, when the paper feed cassette is pulled out, the placing member is lowered by the lowering means against the urging force of the urging member, so that the contact between the take-out roller and the paper can be prevented, and the satisfactorily. You can pull out the paper cassette.

Further, since the movement of the mounting member urged by the urging member in the urging direction is restricted by the restricting means, it is possible to prevent contact between the take-out roller and the paper when the paper cassette is inserted, which is excellent. You can insert a paper cassette.

According to a sixth aspect of the present invention, when the paper feed cassette is pulled out, the first ratchet is engaged with the first rack to fix the first rack, thereby pulling the wire to urge the biasing member. The mounting member is lowered against the urging force of the wire, and the second rack provided in the middle of the wire and the second ratchet are detachably engaged with the second rack to urge the wire. Since the movement of the mounting member in the urging direction by the member is restricted, it is possible to prevent contact between the take-out roller and the paper when the paper cassette is taken in and out, and the paper cassette can be taken in and out favorably.

According to the seventh, eighth and ninth aspects of the present invention, when the sheet feeding cassette is pulled out, the first ratchet is engaged and fixed to the first rack so that the wire is pulled and the biasing member is attached. While lowering the mounting member against the force, the second racket provided in the middle part of the wire is engaged with the second ratchet to restrict the movement of the mounting member in the urging direction. It is possible to prevent contact between the take-out roller and the paper when the paper cassette is taken in and out, so that the paper cassette can be taken in and out favorably.

Furthermore, when the paper feed cassette is inserted into the main body of the apparatus, the second ratchet is brought into contact with the releasing means to operate, whereby the second ratchet is separated from the second rack and regulated. Since it is released, the paper can be taken out by contacting the paper with the take-out roller after the insertion of the paper feed cassette.

Further, according to the present invention, the display means provided on the second rack and interlocking with the mounting member,
Since the remaining amount of the paper on the mounting member is displayed, the remaining amount of the paper can be easily visually discriminated from the outside, and the usability is excellent.

Further, according to a ninth aspect of the present invention, an elastic member is connected to a middle portion of the wire between the first rack and the second rack, and when the sheet feeding cassette is pulled out, the placing member is limited. After descending to, the elastic member extends and allows the sheet cassette to be pulled out.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sheet feeding device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a paper feeding device.

FIG. 3 is a perspective view showing a tray lock mechanism.

FIG. 4 is a side view showing a rack and a ratchet of the tray lock mechanism.

FIG. 5 shows an operation of inserting a paper feed cassette.
FIG. 5A is a diagram showing the insertion process, and FIG. 5B is a diagram showing the insertion process.

6A and 6B show engagement / disengagement operations of the rack and ratchet of the tray lock mechanism, FIG. 6A shows a state in which the ratchet is engaged with the rack, and FIG. 6B shows that the ratchet is disengaged from the rack. The figure which shows a state.

FIG. 7 is a perspective view showing a tray pressing mechanism.

8A and 8B show an engaging / disengaging operation of the rack and the ratchet of the tray pushing mechanism, FIG. 8A is a view showing a state in which the ratchet is detached from the rack, and FIG. 8B is a view showing how the ratchet is engaged with the rack. FIG.

FIG. 9 is a perspective view showing a tray pressing mechanism according to another embodiment of the present invention.

FIG. 10 is a front view showing a sheet remaining amount display portion provided in a tray lock mechanism that is another embodiment of the present invention.

11 is a perspective view showing a paper feed cassette including the paper remaining amount display portion of FIG.

[Explanation of symbols]

 4 ... Pickup roller (take-out roller) 30 ... Device body P ... Paper 1 ... Paper feed cassette 2 ... Tray (placement member) 3 ... Compression spring (biasing member) 17 ... Tray pushing mechanism (lowering means)

Claims (9)

[Claims] 1. A main body of an apparatus having a take-out roller fixed therein, a paper feed cassette provided in the main body of the apparatus so as to be able to be taken in and out, and containing paper taken out by the take-out roller, and stored in the paper feed cassette. A loading member for loading a sheet of paper, an urging member for urging the loading member to press the sheet against the take-out roller, and the loading member for urging the loading member when the sheet cassette is pulled out. An image forming apparatus comprising: a descending unit that descends against the urging force of the image forming apparatus. 2. An apparatus main body having a take-out roller fixed, a paper feed cassette which is provided in the apparatus main body so as to be able to be taken in and out, and accommodates the paper taken out by the take-out roller, and is housed in the paper feed cassette. A loading member for loading a sheet, a biasing member for biasing the loading member to press the sheet against the take-out roller, an operation member connected to the loading member, and a feeding cassette An image forming apparatus comprising: a lowering unit that pulls the operation member when pulling it out and lowers the mounting member against the biasing force of the biasing member. 3. An apparatus main body having a take-out roller fixed, a paper feed cassette that is provided in the apparatus main body so as to be able to be taken in and out, and stores paper taken out by the take-out roller, and is housed in the paper feed cassette. A loading member for loading the sheet, a biasing member for biasing the loading member to press the sheet against the take-out roller, a rack connected to the loading member via a wire, and the apparatus The rack is provided inside the main body, and when the paper feed cassette is pulled out, the rack is engaged with and fixed to the rack, thereby pulling the wire and resisting the biasing force of the biasing member. An image forming apparatus comprising: a ratchet that descends. 4. An apparatus main body having a take-out roller fixed therein, and a paper body provided in the apparatus main body so as to be able to be taken in and out, storing paper taken out by the take-out roller, and having a cam groove on a side surface portion along the take-out direction. A sheet feeding cassette; a placing member for placing a sheet stored in the sheet feeding cassette; an urging member for urging the placing member to press the sheet against the take-out roller; A rack that is connected to the rack via a wire, and that is provided inside the apparatus main body and operates along the cam groove when the paper feed cassette is pulled out to engage the rack and fix the rack. An image forming apparatus comprising: a ratchet that pulls the wire to lower the mounting member against the urging force of the urging member. 5. An apparatus main body having a take-out roller fixed, a paper feed cassette provided in the apparatus main body so as to be able to be taken in and out, and storing paper taken out by the take-out roller, and stored in the paper feed cassette. A loading member for loading a sheet of paper, an urging member for urging the loading member to press the sheet against the take-out roller, and the loading member for urging the loading member when the sheet cassette is pulled out. Lowering means for lowering the urging force of the urging member, regulating means for regulating the movement of the placing member urged by the urging member in the urging direction, and the paper feed cassette inside the apparatus body. When inserted,
An image forming apparatus comprising: a release unit that releases the restriction of the restriction unit. 6. An apparatus main body having a take-out roller fixed, a paper feed cassette that is provided in the apparatus main body so as to be able to be taken in and out, and stores paper taken out by the take-out roller, and is housed in the paper feed cassette. A loading member for loading a sheet, a biasing member for biasing the loading member to press the sheet against the take-out roller, and a first rack connected to the loading member via a wire Provided in the apparatus main body and engaging the first rack to fix the first rack when the paper feed cassette is pulled out, thereby pulling the wire and urging force of the urging member. A first ratchet that lowers the mounting member against the force, a second rack provided in the middle of the wire, and a second rack that is detachably engaged with the biasing member. Moving the mounting member in the urging direction An image forming apparatus comprising: a second ratchet that restricts movement. 7. An apparatus main body having a take-out roller fixed, a paper feed cassette provided in the apparatus main body so as to be able to be taken in and out, and storing paper taken out by the take-out roller, and stored in the paper feed cassette. A loading member for loading a sheet, a biasing member for biasing the loading member to press the sheet against the take-out roller, and a first rack connected to the loading member via a wire Provided in the apparatus main body and engaging the first rack to fix the first rack when the paper feed cassette is pulled out, thereby pulling the wire and urging force of the urging member. A first ratchet that lowers the mounting member against the force, a second rack provided in the middle of the wire, and a second rack that is detachably engaged with the biasing member. Moving the mounting member in the urging direction A second ratchet for restricting movement, and a second ratchet provided in the main body of the apparatus and operated by abutting against the second ratchet when the paper feed cassette is inserted, and separating the second ratchet from the second rack. An image forming apparatus comprising: a releasing unit configured to release the regulation. 8. An apparatus main body having a take-out roller fixed, a paper feed cassette that is provided in and out of the apparatus main body, and stores paper taken out by the take-out roller, and is housed in the paper feed cassette. A loading member for loading a sheet, a biasing member for biasing the loading member to press the sheet against the take-out roller, and a first rack connected to the loading member via a wire Provided in the main body of the apparatus, engages with the first rack to fix the first rack when pulling out the paper feed cassette, and pulls the wire to resist the biasing force of the biasing member. The first ratchet for lowering the placing member by means of the second rack, the second rack provided in the middle of the wire, and the second rack, which is detachably engaged with the placing member by the biasing member. Restrict movement of members in the biasing direction A second ratchet is provided in the main body of the apparatus, and when the paper feed cassette is inserted, the second ratchet is brought into contact with the second ratchet to operate so that the second ratchet is disengaged from the second rack to regulate the ratchet. Release means for releasing, and interlocking with the mounting member provided in the second rack,
An image forming apparatus comprising: a display unit that displays the remaining amount of paper on a mounting member. 9. An apparatus main body having a take-out roller fixed therein, a paper feed cassette which is provided in the apparatus main body so as to be able to be taken in and out, and accommodates the paper taken out by the take-out roller, and is housed in the paper feed cassette. A loading member for loading a sheet, a biasing member for biasing the loading member to press the sheet against the take-out roller, and a first rack connected to the loading member via a wire Provided in the apparatus main body and engaging the first rack to fix the first rack when the paper feed cassette is pulled out, thereby pulling the wire and urging force of the urging member. A first ratchet that lowers the mounting member against the force, a second rack provided in the middle of the wire, and a second rack that is detachably engaged with the biasing member. Moving the mounting member in the urging direction A second ratchet for restricting movement, and a second ratchet provided in the main body of the apparatus and operated by abutting against the second ratchet when the paper feed cassette is inserted, and separating the second ratchet from the second rack. And a release means for releasing the regulation, and the wire is located in the middle of the wire and is connected between the first rack and the second rack. When the paper feed cassette is pulled out, the placing member is lowered to the limit. An image forming apparatus comprising: an elastic member that elastically extends after that.